材料科学
纳米纤维
硫黄
介孔材料
复合数
碳纳米纤维
锂(药物)
电极
复合材料
多孔性
化学工程
碳纤维
热稳定性
碳纳米管
化学
催化作用
有机化学
工程类
内分泌学
物理化学
医学
冶金
作者
Weimin Kang,Liangdong Fan,Nanping Deng,Huijuan Zhao,Quanxiang Li,Minoo Naebe,Jing Yan,Bowen Cheng
标识
DOI:10.1016/j.cej.2017.09.134
摘要
The porous carbon nanofibers-sulfur (PCNFs-S) composite electrode with micro-mesoporous (<10 nm) and meso-macroporous (>10 nm) is successfully designed and prepared via the electro-blown spinning technique and thermal treatment. The meso-macroporous structure in the PCNFs-S composite can provide high sulfur content up to 80 wt%, while micro-mesoporous affords efficient trapping of polysulfides and inhibits the “shuttle effect”. And the tailored porous fibrous network structure and carbon nanotubes (CNTs) in the composite facilitate the construction of a high electrical conductive pathway. Therefore, the lithium-sulfur (Li-S) batteries electrode exhibits high initial discharge capacities as high as 954 and 602.2 mAh g−1 at 0.5 C and 2 C, respectively, and can obtain quite stable capacities of 795 and 601.5 mAh g−1 after 350 cycles.
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